Miele G 7969 Operating Instructions Manual page 124

Installation
Venting the water drainage
If the on-site drainage connection is
situated lower than the guide for the
rollers of the lower basket in the door,
the drainage system must be vented.
Otherwise, a siphoning effect during a
programme can cause the appliance to
empty itself of water.
 Open the dishwasher door fully.
 Remove the lower basket.
 Insert a screwdriver into the middle
opening of the vent valve in the left
wash cabinet wall .
 Press the screwdriver further into the
opening and push it through the
membrane  behind.
The vent opening for the water drain is
now open.
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